private static MessageContext processMessageInCore
(TriggerMessageContext context)
{
// get the handler for the message
var serviceCommand
= context
.MessageContext
.ServiceContext
.ServiceCommandFactory[context.MessageContext.Message.MessageType];
var serviceRequest
= new ServiceRequest(
dataModel: context.MessageContext.ServiceContext.ServiceDataModel
, message: context.MessageContext.Message.Body
);
var serviceResponse
= serviceCommand.Handle(serviceRequest);
// todo: move this to a factory method ( note fix outcomType todo first )
var outcomeContext
= new MessageContext(
serviceContext: context.MessageContext.ServiceContext
, message: new Message(
requestId: context.MessageContext.Message.RequestId
, messageId: context.OutomceMessageId
, messageType: $"{serviceCommand.GetType().Name}Result"
, message: ServiceResponseJsonConverter.Serialise(serviceResponse)
)
);
return(outcomeContext);
}
private static MessageContext processMessage
(TriggerMessageContext triggerContext)
{
if (triggerContext == null)
{
throw new ArgumentNullException(nameof(triggerContext));
}
var transaction
= triggerContext
.MessageContext
.ServiceContext
.ServiceDataModel
.Database
.BeginTransaction(IsolationLevel.Serializable);
try {
var outcome
= triggerContext
.fmap(recordMessageInMessageStore)
.fmap(processMessageInCore)
.fmap(recordMessageOutcome)
;
triggerContext
.MessageContext
.ServiceContext
.ServiceDataModel
.SaveChanges();
transaction.Commit();
return(outcome);
} finally {
transaction.Dispose(); // will roll back the transaction if needed
}
}
private static TriggerMessageContext recordMessageInMessageStore
(TriggerMessageContext context)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
context
.MessageContext
.ServiceContext
.ServiceDataModel
.WriteMessage(context.MessageContext.Message, context.OutomceMessageId);
context
.MessageContext
.ServiceContext
.ServiceDataModel
.SaveChanges();
return(context);
}
